"저수조 위생관리 제도" 개선 방안

한태영,Han, Tae-Yeong 한국상하수도협회 1995 水道 Vol.22 No.4

부분 전송 감소열에 의한 첨두대 평균 전력비 저감 기법

한태영,유영대,최정훈,권영수,김남,Han Tae-Young,Yoo Young-Dae,Choi Jung-Hun,Kwon Young-Soo,Kim Nam 한국전자파학회 2006 한국전자파학회논문지 Vol.17 No.6

직교 주파수 다중 전송 방식 또는 다중 반송파 전송 방식은 첨두대 평균 전력비를 감소하는 것이 요구된다. 또한, 부분 전송열의 부가 전송 문제를 제거하는 것이 필요하다. 따라서, 본 논문에서는 다중 신호로 사용하기 위한 부반송파는 전적으로 첨두대 평균 전력비의 감소에만 사용하는 것으로 한 부분 전송 감소열에 의한 새로운 방식을 제안한다. 즉, 톤 예약 기법에서 사용한 빠른 알고리즘 또는 Convex 최적화 대신에 부분 전송열의 최적화를 약간 수정하여 사용한다. 모의 실험 결과 데이터율 손실이 5 %에서 톤 예약의 반복 횟수를 10으로 하면 제안된 방법 이 M=2, 4, 8(M은 부분 전송 감소열 분할 수)에서 각각 3.2 dB, 3.4 dB, 3.6 dB 개선된다. 그러나, 데이터율 손실이 20 %에서 톤 예약 방법에 비하여 3.4 dB, 3.1 dB, 2.2 dB 떨어진다. 따라서, 데이터율 손실을 적게 할 경우에는 제안된 방법이 M=2에서 톤 예약 방법에 비하여 계산량과 PAPR 저감 능력면에서 우수한 방법이다. It is required to reduce the peak-to-average power ratio(PAPR) in an orthogonal frequency division multiplexing system or a multicarrier system. And it is needed to eliminate the transmission of the side information in the Partial Transmit Sequences. So, in this paper, a new technique is proposed, where the subcarriers used for the multiple signal representation are only utilized for the reduction of PAPR to eliminate the burden of transmitting the side information. That is, it is proposed by taking the modified minimization criteria of partial transmit sequences scheme instead of using the convex optimization or the fast algorithm of tone reservation(TR) technique As the result of simulation, the PAPR reduction capability of the proposed method is improved by 3.2 dB dB, 3.4 dB, 3.6 dB with M=2, 4, 8(M is the number of partition in the so-called partial transmit reduction sequences(PTRS)), when the iteration number of fast algorithm of TR is 10 and the data rate loss is 5 %. But it is degraded in the capability of PAPR reduction by 3.4 dB, 3.1 dB, 2.2 dB, comparing to the TR when the data rate loss is 20 %. Therefore, the proposed method is outperformed the TR technique with respect to the complexity and PAPR reduction capability when M=2.

회전 위상을 파일롯과 데이터 심볼에 덧붙인 첨두대 평균 전력비 저감 기법

한태영,최정훈,김남,Han, Tae-Young,Choi, Jung-Hun,Kim, Nam 한국전자파학회 2007 한국전자파학회논문지 Vol.18 No.1

이 논문은 직교 주파수 다중 전송 통신 방식의 첨두대 평균 전력비를 줄이기 위하여 대역폭과 전력의 효율성을 고려하여 파일롯과 데이터 심볼에 회전 위상을 중첩한 기법에 대한 연구 논문이다. 즉 파일롯 심볼에 위상 회전 벡터를 부가하여 파일롯 심볼 사이의 데이터 심볼의 위상 회전 벡터를 파일롯 심볼의 위상 회전 벡터와 동일하게 하여 전송하는 기법이다. 이러한 방식에 따라 송신기는 부분 분할 전송 기법에 의한 첨두대 평균 전력비를 줄일 수 있고 수신기에서 위상 회전 벡터를 파일롯 심볼의 채널 추정에 의하여 원래의 데이터 심볼을 복원할 수 있다. 따라서 송신기에서는 별도의 부반송파를 첨두대 평균 전력비의 저감하는 용도로 사용하지 않음으로써 효율적인 대역폭의 운용이 가능하고 수신기에서 위상 회전 벡터에 대한 부가적인 전송에 따른 오류에 의한 비트 오율의 급격한 증가를 방지할 수 있다. 다시 말해서 대역폭과 전력 및 통신 성능을 모두 개선할 수 있는 방법이라 할 수 있다. This paper researches on the scheme superimposing the rotation phases over the pilot and data symbols in order to reduce the peak-to-average power ratio(PAPR) of the orthogonal frequency division multiplexing(OFDM) communication. The bandwidth and power efficiency are the main consideration. The phases of rotation vector are added to those of both pilot symbols and data symbols interlaying between any two pilot symbols in an OFDM block. Owing to this scheme the transmitter reduces the PAPR using the partial transmit sequences(PTS) and the receiver restores the data symbol utilizing the channel estimation of pilot symbols. Therefore, the bandwidth efficiency is accomplished by not using the further subcarriers for the reduction of PAPR and the enormous increase of bit error rate according to the receiving error of the side information, i.e. the phases of rotation vector, is prevented. In other words, both bandwidth-and power-efficiency and quality of communication performance can be improved.

IMT 운용을 위한 주파수 소요량 산출

한태영(Tae-Young Han),김남(Nam Kim),양재수(Jaesoo Yang),최정훈(Jung-Hun Choi),김철호(Cheol-Ho Kim) 한국전자파학회 2008 한국전자파학회논문지 Vol.19 No.2

본 논문은 IMT 이동통신 서비스에 있어서 ITU-R의 권고안 ITU-R M.1390, ITU-R [IMT.METH]에 권고한 주파수 소요량 산출의 개요와 그 차이점을 기술하고, ITU-R [IMT.METH] 방법론을 최근의 IMT 서비스에 대한 주파수 소요량을 산출하는데 적용하였다. 발생 호량(offered traffic)과 시스템 용량, 서비스 품질(quality of service) 기준에 의하여 결정되는 운반 호량(carried traffic)에 대한 모델과 알고리즘을 기술하고 산출예로서 최근에 서비스가 개시되고 있는 IMT의 배치에 따른 2010년부터 2015년까지 국내에서 운용되고 있는 IMT 서비스에 대하여 여러 가지 시장 자료와 ITU의 예측 자료를 통하여 얻은 후 주파수 소요량을 산출하였다. This paper describes the overview of spectrum requirement estimation recommended in ITU-R Rec. M.1390 and [IMT.METH] and its difference for the IMT mobile service, and a [IMT.METH] methodology is applied to the spectrum estimation of the recent IMT service. The traffic model and traffic calculation algorithm is briefly described for the carried traffic which is determined in terms of the offered traffic, system capacity, and the criteria of quality of service. And the spectrum requirement demand which is required from year 2010 to year 2015 is calculated as an example for the IMT service which is recently operated and deployed in the current Korean market after obtaining the reasonable market data and the ITU market prediction data.

구진괴사성 결핵진을 동반한 결핵성 림프절염

한태영 ( Tae Young Han ),김지영 ( Ji Young Kim ),곽희원 ( Hee Won Kwak ),최재철 ( Jae Chul Choi ),신종욱 ( Jong Wook Shin ),김재열 ( Jae Yeol Kim ),박인원 ( In Won Park ),김명남 ( Meyung Nam Kim ),최병휘 ( Byoung Whui Choi ) 대한결핵 및 호흡기학회 2007 Tuberculosis and Respiratory Diseases Vol.62 No.6

Lymphadenitis is a common manifestation in tuberculous diseases. However, papulonecrotic tuberculid is an uncommon cutaneous manifestation, and is considered an allergic reaction against tuberculous bacilli in tuberculous lesions other than the lymph nodes. A wide great variety of cutaneous manifestations arise over a period of a few weeks - i.e., papules, necrosis, crusted and atrophic scars. We described a 27-year-old woman with right cervical tuberculous lymphadenitis and skin lesions involving her arms, legs and both fingers. Histopathologically, a leukocytoclastic vasculitis with V-shaped epidermal necrosis was observed in the upper and deep dermis, including the good response to anti-tuberculosis therapy support the diagnosis of papulonecrotic tuberculid. (Tuberc Respir Dis 2007; 62: 536-539)

2% 알부틴 함유 하이드로겔 마스크의 기미개선 효과에 관한 연구

한태영 ( Tae Young Han ),손인평 ( In Pyeong Son ),장우선 ( Woo Sun Jang ),장희선 ( Hee Sun Chang ),김지현 ( Ji Hyun Kim ),심영화 ( Young Hwa Sim ),김두호 ( Du Ho Kim ),김범준 ( Beom Joon Kim ),김명남 ( Myeung Nam Kim ),이현경 ( Hy 대한피부과학회 2011 대한피부과학회지 Vol.49 No.3

Background: Melasma is a common, acquired, symmetrical hypermelanosis that occurs on sun exposed areas of the skin. It is more prevalent among Asian women than among Caucasian women. Many different treatment modalities have been used with various efficacies, but none of them have been completely satisfactory. Arbutin is a naturally occurring gluconopyranoside that may reduce tyrosinase activity, which is a rate-limiting enzyme for melanin production. Objective: The purpose of this study was to investigate the depigmenting effect and safety of a mask that contains 2% arbutin for the treatment of melasma. Methods: A total of 54 female volunteers with melasma were enrolled in this randomized, double-blind, 8-week treatment study. The patients were instructed to apply an arbutin-containing mask or an arbutin-free mask once a day for 8 weeks. The assessment of outcomes included the Melasma Area and Severity Index (MASI) score, colorimetric value (L*), overall patient satisfaction and investigator assessment score (evaluated using photography). Results: The arbutin-containing mask significantly increased the right and left colorimetric values (L*) after the 8-week treatment (p<0.05) compared to the arbutin-free mask. The MASI score was decreased more in the arbutin mask group (p>0.05). The arbutin mask scored better than the control in patient satisfaction and investigator assessment. No significant adverse reactions were observed. Conclusion: The arbutin mask appears to be effective and well-tolerated when used for the treatment of melasma. (Korean J Dermatol 2011;49(3):210∼216)

갈등관리에 대한 직무탈진의 영향

한태영(Han, Tae Young) 한국인사관리학회 2013 조직과 인사관리연구 Vol.37 No.2

본 연구는 직무탈진이 효과적인 갈등관리를 저해하는 부적(-) 관련성을 세부적으로 밝히고 자 한 연구이다. 또한, 직무탈진에 영향을 주는 선행변인으로서 개인이 인식하는 가식(inauthenticity)과 의사소통 역량을 고찰하여 직무탈진이 매개변인의 역할을 하는 과정을 검증하였다. 두 선행변인도 갈등관리에 일부 직접적 영향을 미치는 부분매개 모형이 직무탈진을 통해서 영향을 미치는 완전매개 모형보다 적합함을 검증하였다. 부분 매개모형과 함께, 직무탈진과 갈등관리 간 관계의 강도가 Holland가 대조 관계로 제안한 직무군(즉, 연구직과 경영관련직)과 남녀 성차에 따라서 달라지는지를 검증하여 직무와 성차의 상호작용효과를 살펴보았다. 층화표본추출법을 적용하여 연구직 6개와 경영관련직 5개 등 11개 직군에서 628명의 직장인을 대상으로 자료를 수집하였다. 구조방정식모형을 적용하여 매개모형을 비교검증하고, 핵심경로 외에는 동일성제약(equality constraints)을 적용하여 상호작용모형을 검증하였다. 연구의 결과는 직무군과 성차의 상호작용효과가 유의미하며, 특히 남성-연구직의 경우 직무탈진이 효과적인 갈등관리를 저해하는 부정적 영향이 가장 강한 것으로 나타났다. 이러한 결과를 바탕으로 이론적, 실무적 시사점을 제시하였다. The present study primarily focused on the negative influence of job burnout on the effectiveness of conflict management. Individuals' perceived inauthenticity and communication competency were considered as predictor variables of the job burnout which was, therefore, examined as a mediating variable. The two predictors were also investigated if they have direct effects on conflict management, by the model comparisons with the full-mediation model. In addition, the interaction effects of job type and gender on the relationship between burnout and conflict management were also tested to see if the relationship differs across the groups. Applying a stratified sampling method the study collected 628 employee data from six investigative jobs and five enterprise jobs. The study used the Structural Equation Modeling to compare the mediation models, and the interaction effects were tested adopting the equality constraint methodology to the non-essential paths. Results revealed that the partial mediation model was highly explicable, and that the interaction effects of job type and gender were also significant, thereby burnout having the strongest effect on conflict management for the male investigative group. Based on the findings, theoretical and practical implications were provided.

연소성 류마티스성 관절염으로 오인한 조기 발병형 유육종증

한태영 ( Tae Young Han ),박귀영 ( Kui Young Park ),서성준 ( Seong Jun Seo ),홍창권 ( Chang Kwun Hong ) 대한피부과학회 2007 대한피부과학회지 Vol.45 No.8

Sarcoidosis is a chronic multisystemic granulomatous disorder of unknown cause that occurs rarely in children. There are 2 types of sarcoidosis in children: early onset in children less than 4 years old and late onset in children 8 to 15 years old. The clinical manifestation of late onset sarcoidosis in children is similar to that of adults. Early onset sarcoidosis is difficult to diagnose however because its symptoms mimic those of juvenile rheumatoid arthritis (JRA). Early differentiation of sarcoidosis from JRA is important in planning treatment strategies and in counseling patients and families. Here we present a case of early onset sarcoidosis resembling JRA. (Korean J Dermatol 2007;45(8):821∼824)

부분 전송감소열에 의한 첨두대평균전력비 저감 기법

한태영(Taeyoung Han),최정훈(Jung-Hun Choi),김남(Nam Kim) 한국통신학회 2006 한국통신학회 학술대회논문집 Vol.2006 No.7

개인 및 팀 적응성과의 고찰

한태영(Tae Young Han),차윤석(YunSuk Cha) 한국인사조직학회 2011 인사조직연구 Vol.19 No.1

본 연구는 변화하는 조직환경에 효과적으로 대응하는 구성원의 적응성과를 제고하는 과정을 고찰하였다. 성과관리 측면에서 최근 주목받는 리더의 성과코칭이 보이는 영향력을 적응행동에 대한 몰입효과로서 살펴보았다. 또한 리더의 성과코칭에 대한 과거 성과(인사평가 점수)의 영향을 밝혀서, 개인수준에서는 과거성과가 코칭에 영향을 주고 코칭이 다시 적응성과에 정적 관련성을 보이는 매개과정을 검증하였다. 피드백 과정에서 환경요인의 중요성을 고려하여 조직의 최소 단위 조직인 팀 수준에서는 팀 피드백 환경이 팀 적응성과에 미치는 영향을 밝히고자 하였다. 이를 통해 개인 및 팀 수준의 적응성과에 대한 이론적 관계성을 밝히기 위하여 피드백의 속성을 지닌 선행변수의 효과에 대한 상동모형(homologous model)을 제시하였다. 또한 기존의 적응성과에 대한 연구에서 도출한 구조적 관련성을 활용하여 팀 적응성과가 개인 구성원의 적응성과에 미치는 교차수준(cross-level) 관계를 검증함으로써, 적응성과에 관하여 다수준 접근법에 입각한 기능적 분석을 시도하였다. 상위 수준에서는 피드백 환경이 조직 적응성과에 영향을 주고 이 성과가 개인 적응성과와 관련되는 교차수준 매개효과가 있는지 동시에 검증하여, 중위매개 모형(meso-mediational model)으로 상동관계를 검증하였다. 국내 IT제조업의 현장 근로자 대상으로 139개 팀에서 687명의 자료를 수집하여 다수준 방법론(즉, 위계선형모형)을 사용하여 분석한 결과, 개인 수준에서 코칭의 완전매개 관계를 보여주었고, 상위 수준에서 적응성과가 개인수준 적응성과에 의미 있는 관계가 나타났다. 그러나 상위 수준 적응성과가 피드백 환경의 영향을 매개하는 역할은 나타나지 않았다. 이러한 결과를 바탕으로 팀제 조직이 비일상적 상황에서 성과를 도출하는 현상을 이론적으로 논의하고 미래연구에 대한 시사점을 제시하였다. Adaptability within dynamic business environments is drawing more attention on the survival of today’s organizations. This is largely due to the instability of the environment under which non-routine work tasks and unexpected events have increased. The needs on the adaptability are increasing not only for organizations but also for individuals and teams within organizations. As a result, recent organizations have been giving more attention to the behaviors of employees regarding how effectively they adapt to their non-routine job requirements as one of the performance domains beyond traditional notion of job performance. Organizations also respond to the instability in the environment by organizing work teams as the essential unit for work tasks, thereby changing their organizational structures to flatter hierarchies. Consequently, adaptive performance at the team level should also be considered as an important factor under the current environments to complement the focus on adaptability at the individual level. The purpose of the current research is two-fold. One purpose was to investigate a series of antecedents of individual and team adaptive performance and to test a functional process model that has a goal of enhancing the adaptive performance at the two levels. Combined with the structural analysis of the homologous model, the current study tested the functional influences of feedback-related factors on adaptive performance at the two levels. Given previous findings that effectively given feedback is the source of critical information for proactive behaviors of individuals in organizations, we examined the environmental and personal sources of feedback at the team and individual level respectively. As a team-climate influence, team enriched-feedback environment was primarily examined as the feedback source that affected team members’ aggregated team adaptive performance. At the individual level, the degree to which one is exposed to the coaching experience provided by his or her team leaders was considered as an important source of feedback for their performance when dealing with non-routine tasks. The second purpose of this study was to examine the homology-conceptualization of adaptive performance at both individual and team levels in terms of the structure of the constructs. Although individual-level adaptive performance has been conceptualized independently from team-level adaptive performance in the organizational research literature, both levels are similar in concepts and may help to meet the changing nature of today’s work. However, they also have a significant difference in the sense that individual team members’ adaptabilities may be enhanced by the aggregated support from the team members’ dynamic interaction among their individual adaptive behaviors. We developed a homologous model in order to explore the theoretical relationships on the two levels of adaptive performances. To test the model, we examined a cross-level relationship in which team adaptive performance has a top-down influence on the individual adaptive performance. As for the specific processes, we suggested that the individual adaptive performance is influenced by the coaching from team leaders in which is affected by individual job performance in advance, thereby coaching was hypothesized to have a mediation role between previous performance and the current adaptive performance. Furthermore, for processes at the team level, team adaptive performance was hypothesized to have a positive relationship with team feedback environment so that the team adaptive performance was proposed as a cross-level mediator between team feedback environment and individual adaptive performance.